He _________ harder this year than last year.
| A．study | B．studies | C．was studying | D．studied |
Wind power is a source of energy we may return in the near future.
| A．on which | B．by which | C．to which | D．from which |
The committee is discussing the problem right now. It will _____ have been solved by the end of next week.
| A．generally | B．hopefully | C．immediately | D．likely |
Here are some Christmas presents, ____you can choose one for yourself.
| A．in which | B．from which | C．between which | D．through which |
Many political leaders attended the conference and among those present ____ the foreign minister and his wife.
| A．were | B．included | C．had | D．remained |
--- You should have gone to see the film. It’s very moving.
---______, we arrived too late to catch the last bus.
| A．Absolutely | B．Gradually | C．Constantly | D．Unfortunately |